| 摘要 |
A sigma-delta (SigmaDelta) difference-of-squares LOG-RMS to digital converter" by merging a traditional SigmaDelta modulator with an analog LOG-RMS to DC converter based on a difference-of-squares concept. Two basic architectures include one based on two squaring cells in the feedforward and feedback paths and a second based on a single squaring cell in the forward path. High-order SigmaDelta LOG-RMS can be implemented with a loop filter containing multiple integrators and feedforward and/or feedback paths for frequency compensation. The embodiments as described allow the implementations of SigmaDelta difference-of-squares LOG-RMS to DC converters with a natural digital output and a logarithmically compressed dynamic range. |
